Key parameters at a glance

A radius of 2.12 Earth radii
A mass of 5.14 Earth masses
Surface gravity around 1.14 g
An orbital period of 43.034 days
Semi-major axis 0.2369 AU
Equilibrium temperature 484 K (211 °C)
Distance from Earth 1,500.93 light-years
Earth Similarity Index 0.543
Travel time at Voyager 1 speed 26,468,913 years

Kepler-984 b Planet Profile

Physical Specs

Radius

2.12 R⊕

Radius (Jupiter)

0.189 R♃

Mass

5.14 M⊕

Mass (Jupiter)

0.016 M♃

Density

2.96 g/cm³

Surface Gravity

1.14 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.543

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1782of 1978

top 90.0%

This planet

2.12R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-161 b 2.12 R⊕ Kepler-158 b 2.12 R⊕ HD 97658 b 2.12 R⊕

Metric	Earth	Kepler-984 b	Jupiter
Radius (R⊕)	1.00	2.12	11.21
Mass (M⊕)	1.00	5.14	317.83
Density (g/cm³)	5.51	2.96	1.33
Surface Gravity (g)	1.00	1.14	2.53
Insolation (S⊕)	1.00	13.99	0.037

Star Catalogue Identifiers

TIC

TIC 272837755

Gaia DR2

Gaia DR2 2080314315164334464

Gaia DR3

Gaia DR3 2080314315164334464

System

Kepler-984

Percentile among Sub-Neptune cohort

Radius 2.120 R⊕ · percentile 9 / cohort 1978

Mass 5.140 M⊕ · percentile 10 / cohort 1978

Orbital period 43.03 d · percentile 82 / cohort 1946

Distance 460.19 pc · percentile 45 / cohort 1975

ESI 0.543 · percentile 76 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

43.034 days

Semi-major axis

0.2369 AU

Eccentricity

0.000

Inclination

88.07 °

Year Length

A year here lasts approximately 43.03 Earth days (11.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2369 AU.

Transit Fingerprint

Depth

0.051 %

Duration

6.073 h

Impact parameter b

0.262

Rp / R★

0.020558

Transit midpoint (BJD)

2,454,970.6902

Photometric dip

Transit produces a flux drop of 509 ppm lasting ≈ 6.07 h.

Extended Orbital Architecture

Planet / star radius ratio

0.020558

Semi-major axis / stellar radius

53.400

Impact parameter (b)

0.262

Transit mid-time (BJD)

2,454,970.6902

Angular separation (arcsec)

0.51500

Eq. Temperature

484K

(211 °C)

Insolation (S⊕)

13.99

Earth = 1.00

Earth Similarity (ESI)

0.543

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Transit timing variations

Gravitational interactions from neighbours have been detected.

Discovery Paper

Primary reference

Morton et al. 2016

Instrument

Kepler CCD Array

Publication

2016-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at Kepler (12 shown).

Kepler-1512 b · Rocky Terrestrial Kepler-1410 b · Super-Earth Kepler-560 b · Super-Earth Kepler-1389 b · Super-Earth Kepler-1450 b · Super-Earth Kepler-1544 b · Super-Earth Kepler-1459 b · Super-Earth Kepler-1638 b · Super-Earth Kepler-737 b · Super-Earth Kepler-1185 b · Super-Earth Kepler-1178 b · Rocky Terrestrial Kepler-1040 b · Sub-Neptune

Host System: Kepler-984

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,610 K — cooler than the Sun (5,778 K)

Estimated Age

3.98 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.930 R☉

Stellar Mass

0.960 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.490 dex

Stellar density

1.270 g/cm³

Metallicity ratio

[Fe/H]

Distance

460.19 parsec

Light-years 1,500.93 ly

V-band magnitude

13.60 mag

Voyager-speed travel 26,468,913 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.144 mas

Total Proper Motion

14.065 mas/yr

PM Right Ascension

-2.51 mas/yr

PM Declination

-13.84 mas/yr

Galactic Cartesian (pc)

x = 0.313 · y = -0.615 · z = 0.724

Equatorial (J2000)

RA 296.95886° · Dec 46.39407°

Galactic ℓ, b

80.080° · 10.408°

Ecliptic λ, β

318.562° · 65.351°

HTM-20 index

-2086784398